Quantity   Component name
1 × digispark digispark - got from someone else, prob a Chinese knockoff, but whatever for prototyping
1 × 2x 18650 Sony LiION cells 2x 18650 Sony LiION cells recovered from laptop pack, 3D printed replacement base fits them...
1 × stupidly bright 5mm LED relatively cheap, rather bright (for what it is) LED from Vishay (https://www.digikey.ca/product-detail/en/vishay-semiconductor-opto-division/VLCS5830/VLCS5830-ND/4073503)
1 × cool housing found by random chance -- the machined acetyl base will probably be replaced by a 3D printed (PLA?) unit, see logs and files.
1 × CCFL transformer CCFL transformer, now discontinued, Bourns part (http://www.digikey.ca/product-detail/en/bourns-inc/PM61300-2-RC/M8101CT-ND/774641) -- equivalent can be scavenged from old LCD backlight drivers.
1 × acrylic LED diffuser made to suit - please see files section and comments
2 × 2STX1360 STMicroelectronics low voltage fast-switching NPN power transistors (Ic = 3A)
1 × 1N4007 General purpose silicon rectifier, 1kV peak reverse voltage
1 × HV circuit prototyping PCB made to suit, using upcycled CCFL transformer - see photo (schematic to follow)
1 × Russian SI-22G / SI22G Geiger Tube Russian SI-22G / SI22G Geiger Tube from your usual friendly Eastern European suppliers :)
2 × MHV connector, Amphenol p/n 27000 MHV coax connector: http://ca.mouser.com/ProductDetail/Amphenol-RF/27000/?qs=sGAEpiMZZMukCeVMgJHkjAqBLdGGP2zNC%252bEmC46WRoo%3d
1 × MHV to MHV cable ...scrounge or build, but be sure the coax is able to handle the potentials, esp if using a GM tube with a higher threshold voltage.
1 × GM tube holder - TBD it's nice to not be electrocuted :)